Appreciate your help guys, the spot look like water droplets, so I will give your idea a go Hexalent. I have seen the reducer formula but was going to leave it until I got the basics worked out. I'll give the borax and citrus a go as like I said earlier nothing seem to wash out of the paper it the first wash maybe this will help...

Ah! The evil water droplet strikes again! A drop on the paper will indeed affect a coating; sometimes causing more sensitizer to sink in, or the complete opposite. I had a (bad) habit of giving my coating brush a good shake before coating, sending droplets flying - and I wondered why I was seeing little spots on my prints.

Some folks add "Tween" or Photo-flo to their sensitizer to facilitate even coating on stubborn papers.

If you look closely, you will likely observe a faint cloudiness in the first wash water; the silver nitrate combines with chlorine in the water producing a insoluble silver chloride (assuming your water is chlorinated). Although there are no spectacular indications that unwanted salts are being removed, be assured that they are!